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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Provide nourishment for the developing sperm






2. 265-285 days






3. Why Dairy calves are fed powdered milk.






4. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






5. When are steers and heifers weaned from bottle feeding?






6. Prevent the cow from getting an infection from the calve






7. Produce testosterone. located between the seminiferous tubules






8. Microscopic - make sure not sterile - very few bulls are actually tested






9. (LH) causes female's egg to break (her period)






10. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






11. Milk ~305 days - dry 60 days prior to calving






12. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






13. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






14. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






15. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






16. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






17. When are dairy cattle dehorned?






18. Not under a timeline - cow can not be sold as steak






19. Front feet and head first. (except for hogs and dogs)






20. Why Dairy calves are fed powdered milk.






21. Duct through penis that carries sperm and urine






22. 1-2 days






23. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






24. What helps regulate spermatogenesis?






25. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






26. When are dairy cattle dehorned?






27. What makes the milk flow through the mammary glands?






28. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






29. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






30. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






31. Sperm is produced here






32. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






33. Animals which have many estrous periods per year (ex: cow - sow)






34. Can survive ~7 days in cow. vast majority <48 hours






35. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






36. (male) pushes the testes outward toward the legs for a cool-down off of the body






37. Luteolysis happens because of the ____________ hormone






38. Superior genes are _______ to multiply






39. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






40. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






41. Why does estrus happen before ovulation?






42. To remove/separate testicles from animal's body before animal reaches puberty






43. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






44. 30 hours after estrus begins






45. ~60 days before calving






46. Way to know everything is alright with the breeding male






47. Why does estrus happen before ovulation?






48. (FSH) causes egg to mature in females






49. 30-38 hours after estrus cycle begins






50. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm